XML 75 R60.htm IDEA: XBRL DOCUMENT v3.22.0.1
Stock Award Plans, Director Plan Outstanding and Exercisable Options (Details) - Director Plan [Member] - Stock Options [Member]
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
shares
First Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) $ 61.89
Range of Exercise Prices, upper limit (in dollars per share) $ 62.48
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 20,500
Weighted Average Remaining Contractual Life 7 months 6 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 62.19
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 20,500
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 62.19
Second Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) 70.65
Range of Exercise Prices, upper limit (in dollars per share) $ 99.52
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 68,480
Weighted Average Remaining Contractual Life 2 years 1 month 6 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 86.39
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 68,480
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 86.39
Third Price Range [Member]  
Outstanding and Exercisable Stock options [Abstract]  
Range of Exercise Prices, lower limit (in dollars per share) 61.89
Range of Exercise Prices, upper limit (in dollars per share) $ 99.52
Options Outstanding [Abstract]  
Number Outstanding (in shares) | shares 88,980
Weighted Average Remaining Contractual Life 1 year 9 months 18 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share) $ 80.82
Options Exercisable [Abstract]  
Number Exercisable (in shares) | shares 88,980
Weighted Average Exercise Price, Options Exercisable (in dollars per share) $ 80.82
Full Exercise Price Range [Member]  
Options Outstanding [Abstract]  
Aggregate Intrinsic Value, Options Outstanding | $ $ 0
Options Exercisable [Abstract]  
Aggregate Intrinsic Value, Options Exercisable | $ $ 0